Magnetotransport in Pd-Rich PdFe Alloys

Kudrnovský, J.; Drchal, V.; Turek, I.

doi:10.1007/s10948-012-2080-5

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…This is a reasonable choice if one considers the temperature at which magnetic heating was done (T = 300 K) and the Curie temperature (T = 670 K) [33,34]. Calculated resistivities of the AFM and FM phases, 124.8 and 52.4 μ cm, respectively, compare well with the experiment (127 and 68 μ cm) [16].…”

Section: Effect Of Spin Disordermentioning

confidence: 78%

“…This model can be used even for the ideal B2-FeRh alloy without chemical disorder. On the other hand, a relation of Imz and corresponding temperature is beyond the limits of this simple model; and (ii) the effect of spin disorder mediated by a finite temperature on transport properties will be studied using the uncompensated DLM model [32][33][34] (see Sec. III D 2).…”

Section: Formalism and Computational Detailsmentioning

confidence: 99%

“…This case is simplified by the fact that experiment is done at a fixed temperature and we shall thus concentrate on the effect of the spin disorder caused by temperature. The effect of spin disorder [32] is simulated in the framework of the uncompensated DLM (uDLM) model which was recently successfully applied to study the effect of temperature on transport properties in ordering Pd-rich PdFe and FePt alloys in the L1 2 and L1 0 structures, respectively [33,34]. The spin disorder is described as a random distribution of local moments Fe [+] and Fe [−] pointing in opposite directions.…”

Section: Effect Of Spin Disordermentioning

confidence: 99%

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Physical properties of FeRh alloys: The antiferromagnetic to ferromagnetic transition

2015

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The electronic, magnetic, thermodynamical, and transport properties of FeRh alloys are studied from first principles. We present a unified approach to the phase stability, an estimate of exchange interactions in various magnetic phases, and transport properties including the effect of temperature which are all based on the same electronic-structure model. Emphasis is put on the transition between the ferromagnetic (FM) and antiferromagnetic (AFM) phases. Such a study is motivated by a recent suggestion of FeRh as a room-temperature antiferromagnetic memory resistor. The theory predicts the order-disorder transformation from the hypothetical disordered bcc phase into ordered B2 phase. Comparison of exchange interactions in the magnetically ordered FM and AFM phases with corresponding spin-disordered counterparts allows us to identify relevant interactions which are precursors of magnetically ordered phases. The most important result is the explanation of a dramatic decrease of the resistivity accompanying the AFM to FM phase transition which is due to the spin disorder present in the system. The study of the anisotropic magnetoresistance in the AFM phase found recently experimentally is extended also to finite temperatures.

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Section: Effect Of Spin Disordermentioning

confidence: 78%

Section: Formalism and Computational Detailsmentioning

confidence: 99%